Non-Desiccant Breathers

Des-Case Non-Desiccant breathers prevent contamination ingress in low humidity environments or in applications where water-based fluids are in use (e.g. water glycol hydraulic fluid). They help to prevent contamination by preventing free water as well as particles down to 1 micron from getting into the reservoir.

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Product Specs

Unit Height (in / mm) 1.35 / 34.3 5 / 127
Unit Diameter (in / mm) 1.80 / 45.7 5 / 127
Connection Size 3/8" 1" Female (FNPT)
Max. Flow Rate (cfm) 0.67 @ 1 psid 40 @ 1 psid
Max. Flow Rate (lpm) 19 1132
Filter Efficiency 0.3µ absolute (β₀.₃≥1000) 0.3µ absolute (β₀.₃≥1000)
Operating Temp. Range (°F) -40° to 300° -40° to 300°
Operating Temp. Range (°C) -40° to 149° -40° to 149°
Model Max. Airflow at 1 psid  Recommended Max. Volume
Gearbox / Storage Tank Hydraulic Reservoir
DC-ND-2 0.67 cfm / 19 lpm 15 gal / 57 L 15 gal / 57 L 
DC-ND-35 40 cfm / 1132 lpm Sizing should be made per flow rate Sizing should be made per flow rate

Please Note: This is intended as a general guideline for sizing only; other considerations, such as: humidity level, frequency of air flow, ambient temperatures, and chemical compatibility are very important in sizing a breather properly. Larger applications and special circumstances typically require the most thorough analysis. Please contact Des-Case for assistance in sizing a breather.


  • Low Humidity
  • Oil Misting
  • Arid Environments
  • High Dust
  • Water-Based Fluids
  • Oil Sight Glasses (DC-ND-2)
  • Small Gearboxes (DC-ND-2)

As wet, contaminated air is drawn through the unit, the hydrophobic media repels water while the pleated particulate filter captures dirt, preventing both from entering the equipment.

Description Part Number
1" NPT Vacuum Indicator Adapter (DC-ND-35) DC-SB-VI
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